English version

jack-knife

From Longman Dictionary of Contemporary English
Related topics: Daily life
jack-knifeˈjack-knife1 noun (plural jack-knives) [countable]  1 Da knife with a blade that folds into its handle2 JUMPa dive in which you bend at the waist when you are in the air
Related topics: Motor vehicles
jack-knifejack-knife2 verb [intransitive]  TTCSLIDEif a large vehicle with two parts jack-knifes, it slides out of control and the back part swings towards the front part The truck skidded on the ice and jack-knifed.
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jack-knife
Simple Form
Present
I, you, we, theyjack-knife
he, she, itjack-knifes
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Past
I, you, he, she, it, we, theyjack-knifed
Present perfect
I, you, we, theyhave jack-knifed
he, she, ithas jack-knifed
Past perfect
I, you, he, she, it, we, theyhad jack-knifed
Future
I, you, he, she, it, we, theywill jack-knife
Future perfect
I, you, he, she, it, we, theywill have jack-knifed
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Continuous Form
Present
Iam jack-knifing
he, she, itis jack-knifing
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you, we, theyare jack-knifing
Past
I, he, she, itwas jack-knifing
you, we, theywere jack-knifing
Present perfect
I, you, we, theyhave been jack-knifing
he, she, ithas been jack-knifing
Past perfect
I, you, he, she, it, we, theyhad been jack-knifing
Future
I, you, he, she, it, we, theywill be jack-knifing
Future perfect
I, you, he, she, it, we, theywill have been jack-knifing
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